Update a file inside zip with -u

Question

Alright so i have a zip file called data.zip on my desktop. Inside test.zip is another folder called res and inside res is a file called info.txt I have used the zip -u command before to move a file inside the zip but only to the root of the zip i want to move a new version of info.txt from my desktop to the res folder of data.zip i need it for part of a script i'm working on. How can i do this or will the -u function only work for the root? Thank you for any help on how i can accomplish this

Answer 1

Use the -j option (*j*unk the pathname) if you want to target the root of the zip; in order to target a subdirectory, you'll need to arrange your current directory such that the relative path from it to the file matches the relative path inside the zipfile. Something like this:

mkdir res
cp $DESKTOP/info.txt res
zip -u data.zip res/info.txt
rm -rf res